AD7799

更新时间： 2024-11-22 23:16:19

品牌	Logo	应用领域
亚德诺 - ADI		仪表放大器
页数	文件大小	规格书
17页	672K
描述
Low Power, 24-Bit/16-Bit Sigma-Delta ADC with In-Amp

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

AD7799 数据手册

Low Power, 24-Bit/16-Bit

Sigma-Delta ADC with In-Amp

Preliminary Technical Data

AD7798/AD7799

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Resolution:

AD7798: 16-Bit

AD7799: 24-Bit

REFERENCE

DETECT

AD7799/AD7798

Three Differential Analog Inputs

Low Noise Programmable Gain Amp

RMS noise: 80 nV (Gain = 64) at 16.6 Hz update rate (AD7798)

65 nV (Gain = 64) at 16.6 Hz update rate (AD7799)

30 nV (Gain = 64) at 4 Hz update rate (AD7799)

Update Rate: 4 Hz to 500 Hz

Power

AIN1(+)

SERIAL

INTERFACE

AND

CONTROL

LOGIC

AIN1(-)

DOUT/RDY

DIN

AIN2(+)

AIN2(-)

SIGMA DELTA

ADC

IN-AMP

MUX

SCLK

AIN3(+)/P1

AIN3(-)/P2

GND

PWRSW

INTERNAL

CLOCK

Supply: 2.7 V to 5.25 V operation

Normal: 330 µA typ (AD7798)

400 µA typ (AD7799)

GND

Figure 1.

Power-down: 1 µA max

GENERAL DESCRIPTION

Simultaneous 50 Hz/60 Hz Rejection

Two Programmable Digital Outputs

Internal Clock Oscillator

Reference Detect

100 nA Burnout Currents

Low Side Power Switch

Independent Interface Power Supply

16-Lead TSSOP

The AD7798/AD7799 is a low power, complete analog front end

for low frequency measurement applications. The device

contains a low noise 24-bit (AD7799)/ 16-bit (AD7798) ∑-∆

ADC with three differential inputs. The on-chip low noise

instrumentation amplifier means that signals of small

amplitude can be interfaced directly to the ADC. With a gain

setting of 64, the rms noise is 80 nV for AD7798 and 65 nV for

the AD7799 at 16.6 Hz.

The device contains a low side power switch which is useful in

bridge applications. The switch allows the bridge to be

disconnected from the power supply when conversions are not

being performed and this will minimise power consumption.

The device also has 100 nA burnout currents. These currents

are used to detect if sensors connected to the analog inputs are

burnt out. Other on-chip features include an internal clock so

the user does not have to supply a clock to the device. This

reduces the component count in a system and provides board

space savings. The update rate is programmable on the

AD7798/99. It can be varied from 4 Hz to 500 Hz.

INTERFACE

3-wire serial

SPI®, QSPI™, MICROWIRE™, and DSP compatible

Schmitt trigger on SCLK

APPLICATIONS

Pressure measurement

Weigh scales

The part operates with a single power supply from 2.7 V to 5.25

V. It consumes a current of 380 uA maximum for the AD7798

and 450 uA maximum for the AD7799. The AD7799/AD7798 is

housed in a 16-lead TSSOP package.

Rev. PrD.

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

12 3 4 5 6 7...17

中文翻译

下载PDF

与AD7799相关器件

型号	品牌	获取价格	描述	数据表
AD7799_15	ADI	获取价格	3-Channel, Low Noise, Low Power
AD7799BRU	ADI	获取价格	3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp
AD7799BRU-REEL	ADI	获取价格	3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp
AD7799BRUZ	ROCHESTER	获取价格	3-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB, TSSOP-16
AD7799BRUZ	ADI	获取价格	3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp
AD7799BRUZ-REEL	ADI	获取价格	3-Channel, Low Noise, Low Power, 16-/24-Bit,
AD7799BRUZ-REEL	ROCHESTER	获取价格	3-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB, TSSOP-16
AD779AD	ADI	获取价格	14-Bit 128 kSPS Complete Sampling ADC
AD779AJ	ETC	获取价格	Analog-to-Digital Converter， 14-Bit
AD779BD	ADI	获取价格	14-Bit 128 kSPS Complete Sampling ADC

与AD7799相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

36
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

28
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

56
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

53

产品中心

服务支持

精选活动

关于我们

帮助中心

AD7799

AD7799 数据手册

与AD7799相关器件

与AD7799相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AD7799

AD7799 数据手册

与AD7799相关器件

与AD7799相关文章

您还可以找

您在本页遇到什么问题？